Tire-wheel assembly, tire, and wireless power receiving system

Abstract

A tire-wheel assembly includes: a wheel having a rim portion at least part of which is formed of a non-magnetic material; and a tire mounted on the rim portion, in which a tread portion includes a belt formed of a non-magnetic material. The wheel includes, inside the rim portion in a tire radial direction, a container portion that contains a power receiving device that receives electric power supplied wirelessly from outside of the tire in the tire radial direction. The tire includes bead fillers. When BFH represents a radial height of the bead fillers and SH represents a tire cross-sectional height, 0.1≤BFH/SH≤0.5 holds true.

The invention claimed is: 
     
       1. A tire-wheel assembly comprising:
 a wheel having a rim portion; and 
 a tire mounted on the rim portion, the tire having a tread portion formed of a non-magnetic material and sidewall portions including a magnetic material, wherein 
 the wheel includes, inside the rim portion in a tire radial direction: a power receiving device comprising a power receiving coil configured to receive electric power supplied wirelessly from outside of the tire in the tire radial direction; and a container portion configured to contain the power receiving device, 
 the tire includes a bead filler, 
 when BFH represents a radial height of the bead filler and SH represents a tire cross-sectional height, 0.1≤BFH/SH≤0.5 holds true, 
 the rim portion of the wheel comprises; a resin part facing the tread portion of the tire in the tire radial direction and formed of a resin material; and a magnetic part located outside the resin part in a tire width direction and formed of a magnetic material, 
 the power receiving coil of the power receiving device is configured to face the resin part of the rim portion in the tire radial direction, and 
 the tire comprises: a carcass including a carcass cord formed of a non-magnetic material; and a belt including a belt cord formed of a non-magnetic material. 
 
     
     
       2. The tire-wheel assembly according to  claim 1 , wherein the tread portion of the tire includes a carcass formed of a resin material and a belt formed of a resin material. 
     
     
       3. The tire-wheel assembly according to  claim 1 ,
 wherein 
 the wheel includes a disk portion, and 
 the disk portion contains a magnetic material. 
 
     
     
       4. The tire-wheel assembly according to  claim 1 , wherein the power receiving device receives electric power supplied by an electromagnetic induction method. 
     
     
       5. The tire-wheel assembly according to  claim 1 , wherein the power receiving device supplies the received electric power to an in-wheel motor. 
     
     
       6. The tire-wheel assembly according to  claim 2 ,
 wherein 
 the wheel includes a disk portion, and 
 the disk portion contains a magnetic material. 
 
     
     
       7. The tire-wheel assembly according to  claim 2 , wherein the power receiving device receives electric power supplied by an electromagnetic induction method. 
     
     
       8. The tire-wheel assembly according to  claim 2 , wherein the power receiving device supplies the received electric power to an in-wheel motor. 
     
     
       9. The tire-wheel assembly according to  claim 3 , wherein the power receiving device receives electric power supplied by an electromagnetic induction method. 
     
     
       10. The tire-wheel assembly according to  claim 3 , wherein the power receiving device supplies the received electric power to an in-wheel motor. 
     
     
       11. The tire-wheel assembly according to  claim 1 , wherein the resin part of the rim portion is a well. 
     
     
       12. The tire-wheel assembly according to  claim 11 , wherein
 the rim portion of the wheel further comprises a pair of bead seats, and 
 the well is concave inwardly in the tire radial direction between the pair of bead seats in the tire width direction. 
 
     
     
       13. The tire-wheel assembly according to  claim 1 , wherein
 the rim portion of the wheel comprises a pair of bead seats; and a well between the pair of bead seats in the tire width direction, 
 the well comprises a bottom surface and inclined surfaces, the inclined surfaces declining inwardly in the tire width direction, to the inside in the tire radial direction, from boundaries with the bead seats to the bottom surface, and 
 the resin part of the rim portion includes at least the bottom surface of the well.